13620705 has 32 divisors (see below), whose sum is σ = 25261824. Its totient is φ = 6137856.

The previous prime is 13620703. The next prime is 13620707. The reversal of 13620705 is 50702631.

It is an interprime number because it is at equal distance from previous prime (13620703) and next prime (13620707).

It is not a de Polignac number, because 13620705 - 2¹ = 13620703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13620703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6777 + ... + 8553.

It is an arithmetic number, because the mean of its divisors is an integer number (789432).

Almost surely, 2^13620705 is an apocalyptic number.

13620705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13620705 is a deficient number, since it is larger than the sum of its proper divisors (11641119).

13620705 is a wasteful number, since it uses less digits than its factorization.

13620705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 13620705 is about 3690.6239309905. The cubic root of 13620705 is about 238.8177096591.

It can be divided in two parts, 1362070 and 5, that added together give a triangular number (1362075 = T₁₆₅₀).

The spelling of 13620705 in words is "thirteen million, six hundred twenty thousand, seven hundred five".